So the above saddle is good for Reining? I noticed that it has a square skirt instead of a shaped skirt though. Is that okay? Sorry I've always ridden English so I'm pretty clueless when it comes to western riding.
Also how do I figure out what size gullet and type of bars my horse needs?
Well, you'll have to try some saddles on your horse before you have a clue what gullet size and bars you need. My dad told me that it's easier to get a wider saddle that you can pad for than one that will pinch your horse, and if you're just starting, buy a used saddle and find out what you need before getting a new one.
The problem a lot of times with trying local tack stores is that they do not carry reining saddles. Non around here do. I know what I like b/c I have ridden in a lot of different saddles as my trainer has so many. That is really the only way to really know what you will like. Sitting on one in a tack store is not going to give you a really good idea. It will give you a general idea but once you put them on a horse and actualy move in them it will change.
As for the bars. Normally if it is a QH you will need full QH bars. Then you can take a hanger and bend it around the horses withers and find out what size of FQB you will need. My reiners take FQB and about a 7-7 1/4 in. However if you can ride on several with your horse at a trainers if you have a reining trainer in your area.